Bump version to 3.0.0 (#89)

* Bump version to 3.0.0

Bump version to 3.0.0
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 73d5b0f..335b05b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,4 @@
-## 2.3.0
+## 3.0.0
 
 * `thenReturn` now throws an `ArgumentError` if either a `Future` or `Stream`
   is provided. `thenReturn` calls with futures and streams should be changed to
diff --git a/pubspec.yaml b/pubspec.yaml
index b417673..839a096 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,5 +1,5 @@
 name: mockito
-version: 2.2.1
+version: 3.0.0
 authors:
   - Dmitriy Fibulwinter <fibulwinter@gmail.com>
   - Dart Team <misc@dartlang.org>